// Copyright 2004-2010 Castle Project - http://www.castleproject.org/
// 
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// 
//     http://www.apache.org/licenses/LICENSE-2.0
// 
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

namespace Commons.Collections
{
    using System.IO;
    using System.Text;

    /// <summary>
    /// This class is used to read properties lines.  These lines do
    /// not terminate with new-line chars but rather when there is no
    /// backslash sign a the end of the line.  This is used to
    /// concatenate multiple lines for readability.
    /// </summary>
    internal class PropertiesReader : StreamReader
    {
        /// <summary>
        /// Constructor.
        /// </summary>
        /// <param name="reader">A Reader.</param>
        public PropertiesReader(StreamReader reader) : base(reader.BaseStream)
        {
        }

        /// <summary>
        /// Read a property.
        /// </summary>
        /// <returns>A String.</returns>
        public string ReadProperty()
        {
            StringBuilder buffer = new StringBuilder();


            while (true)
            {
                string line = ReadLine();

                if (line == null)
                {
                    return null;
                }

                line = line.Trim();

                if ((line.Length != 0) && (line[0] != '#'))
                {
                    if (line.EndsWith(@"\"))
                    {
                        line = line.Substring(0, (line.Length - 1) - (0));
                        buffer.Append(line);
                    }
                    else
                    {
                        buffer.Append(line);
                        break;
                    }
                }
            }


            return buffer.ToString();
        }
    }
}